CAJ | 학술논문

通过对北京地区的多根退役110 kV及220 kV交联聚乙烯电缆绝缘层进行差示扫描量热、热失重和傅里叶红外光谱等分析,研究了绝缘材料的聚集态结构及热稳定性.结果表明:电缆带电运行使XLPE的熔程变宽,带电运行的时间与材料的结晶度没有明显的关系.热失重和傅里叶红外光谱结果反映出退役XLPE电缆中只有少数试样发生了一定程度的热氧老化,大多数电缆绝缘层没有发生明显的热氧老化.
통과대북경지구적다근퇴역110 kV급220 kV교련취을희전람절연층진행차시소묘량열、열실중화부리협홍외광보등분석,연구료절연재료적취집태결구급열은정성.결과표명:전람대전운행사XLPE적용정변관,대전운행적시간여재료적결정도몰유명현적관계.열실중화부리협홍외광보결과반영출퇴역XLPE전람중지유소수시양발생료일정정도적열양노화,대다수전람절연층몰유발생명현적열양노화.
The aggregation structure and thermal stability of the insulating materials from 110 kV and 220 kV XLPE cables out of service in Beijing were studied by differential scanning calorimetry(DSC), ther-mo-gravimetric analysis(TGA) and Fourier transform infrared spectroscopy(FT-IR). The results show that the melting range of the XLPE broadens if the cables are in live operation, and there are no obvious re-lationships between the operating time and crystallinity of the materials. The results of TGA and FT-IR indicate that only few samples exist certain extent of thermal oxidative aging, and most samples show no obvious thermal oxidative aging.